/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "DynamicsCompressorNode.h"

#include "mozilla/dom/DynamicsCompressorNodeBinding.h"

#include "nsAutoPtr.h"

#include "AudioNodeEngine.h"

#include "AudioNodeStream.h"

#include "AudioDestinationNode.h"

#include "WebAudioUtils.h"

#include "blink/DynamicsCompressor.h"

using WebCore::DynamicsCompressor;

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_INHERITED(DynamicsCompressorNode, AudioNode,

                                   mThreshold,

                                   mKnee,

                                   mRatio,

                                   mAttack,

                                   mRelease)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DynamicsCompressorNode)

NS_INTERFACE_MAP_END_INHERITING(AudioNode)

NS_IMPL_ADDREF_INHERITED(DynamicsCompressorNode, AudioNode)

NS_IMPL_RELEASE_INHERITED(DynamicsCompressorNode, AudioNode)

class DynamicsCompressorNodeEngine final : public AudioNodeEngine

{

public:

  explicit DynamicsCompressorNodeEngine(AudioNode* aNode,

                                        AudioDestinationNode* aDestination)

    : AudioNodeEngine(aNode)

    , mDestination(aDestination->Stream())

    // Keep the default value in sync with the default value in

    // DynamicsCompressorNode::DynamicsCompressorNode.

    , mThreshold(-24.f)

    , mKnee(30.f)

    , mRatio(12.f)

    , mAttack(0.003f)

    , mRelease(0.25f)

    , mCompressor(new DynamicsCompressor(mDestination->SampleRate(), 2))

  {

  }

  enum Parameters {

    THRESHOLD,

    KNEE,

    RATIO,

    ATTACK,

    RELEASE

  };

  void RecvTimelineEvent(uint32_t aIndex,

                         AudioTimelineEvent& aEvent) override

  {

    MOZ_ASSERT(mDestination);

    WebAudioUtils::ConvertAudioTimelineEventToTicks(aEvent,

                                                    mDestination);

    switch (aIndex) {

    case THRESHOLD:

      mThreshold.InsertEvent<int64_t>(aEvent);

      break;

    case KNEE:

      mKnee.InsertEvent<int64_t>(aEvent);

      break;

    case RATIO:

      mRatio.InsertEvent<int64_t>(aEvent);

      break;

    case ATTACK:

      mAttack.InsertEvent<int64_t>(aEvent);

      break;

    case RELEASE:

      mRelease.InsertEvent<int64_t>(aEvent);

      break;

    default:

      NS_ERROR("Bad DynamicsCompresssorNodeEngine TimelineParameter");

    }

  }

  void ProcessBlock(AudioNodeStream* aStream,

                    GraphTime aFrom,

                    const AudioBlock& aInput,

                    AudioBlock* aOutput,

                    bool* aFinished) override

  {

    if (aInput.IsNull()) {

      // Just output silence

      *aOutput = aInput;

      return;

    }

    const uint32_t channelCount = aInput.ChannelCount();

    if (mCompressor->numberOfChannels() != channelCount) {

      // Create a new compressor object with a new channel count

      mCompressor = new WebCore::DynamicsCompressor(aStream->SampleRate(),

                                                    aInput.ChannelCount());

    }

    StreamTime pos = mDestination->GraphTimeToStreamTime(aFrom);

    mCompressor->setParameterValue(DynamicsCompressor::ParamThreshold,

                                   mThreshold.GetValueAtTime(pos));

    mCompressor->setParameterValue(DynamicsCompressor::ParamKnee,

                                   mKnee.GetValueAtTime(pos));

    mCompressor->setParameterValue(DynamicsCompressor::ParamRatio,

                                   mRatio.GetValueAtTime(pos));

    mCompressor->setParameterValue(DynamicsCompressor::ParamAttack,

                                   mAttack.GetValueAtTime(pos));

    mCompressor->setParameterValue(DynamicsCompressor::ParamRelease,

                                   mRelease.GetValueAtTime(pos));

    aOutput->AllocateChannels(channelCount);

    mCompressor->process(&aInput, aOutput, aInput.GetDuration());

    SendReductionParamToMainThread(aStream,

                                   mCompressor->parameterValue(DynamicsCompressor::ParamReduction));

  }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override

  {

    // Not owned:

    // - mDestination (probably)

    // - Don't count the AudioParamTimelines, their inner refs are owned by the

    // AudioNode.

    size_t amount = AudioNodeEngine::SizeOfExcludingThis(aMallocSizeOf);

    amount += mCompressor->sizeOfIncludingThis(aMallocSizeOf);

    return amount;

  }

  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override

  {

    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);

  }

private:

  void SendReductionParamToMainThread(AudioNodeStream* aStream, float aReduction)

  {

    MOZ_ASSERT(!NS_IsMainThread());

    class Command final : public Runnable

    {

    public:

      Command(AudioNodeStream* aStream, float aReduction)

        : mozilla::Runnable("Command")

        , mStream(aStream)

        , mReduction(aReduction)

      {

      }

      NS_IMETHOD Run() override

      {

        RefPtr<DynamicsCompressorNode> node =

          static_cast<DynamicsCompressorNode*>

            (mStream->Engine()->NodeMainThread());

        if (node) {

          node->SetReduction(mReduction);

        }

        return NS_OK;

      }

    private:

      RefPtr<AudioNodeStream> mStream;

      float mReduction;

    };

    mAbstractMainThread->Dispatch(do_AddRef(new Command(aStream, aReduction)));

  }

private:

  RefPtr<AudioNodeStream> mDestination;

  AudioParamTimeline mThreshold;

  AudioParamTimeline mKnee;

  AudioParamTimeline mRatio;

  AudioParamTimeline mAttack;

  AudioParamTimeline mRelease;

  nsAutoPtr<DynamicsCompressor> mCompressor;

};

DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* aContext)

  : AudioNode(aContext,

              2,

              ChannelCountMode::Explicit,

              ChannelInterpretation::Speakers)

  , mThreshold(new AudioParam(this, DynamicsCompressorNodeEngine::THRESHOLD,

                              "threshold", -24.f, -100.f, 0.f))

  , mKnee(new AudioParam(this, DynamicsCompressorNodeEngine::KNEE,

                         "knee", 30.f, 0.f, 40.f))

  , mRatio(new AudioParam(this, DynamicsCompressorNodeEngine::RATIO,

                          "ratio", 12.f, 1.f, 20.f))

  , mReduction(0)

  , mAttack(new AudioParam(this, DynamicsCompressorNodeEngine::ATTACK,

                           "attack", 0.003f, 0.f, 1.f))

  , mRelease(new AudioParam(this, DynamicsCompressorNodeEngine::RELEASE,

                            "release", 0.25f, 0.f, 1.f))

{

  DynamicsCompressorNodeEngine* engine = new DynamicsCompressorNodeEngine(this, aContext->Destination());

  mStream = AudioNodeStream::Create(aContext, engine,

                                    AudioNodeStream::NO_STREAM_FLAGS,

                                    aContext->Graph());

}

/* static */ already_AddRefed<DynamicsCompressorNode>

DynamicsCompressorNode::Create(AudioContext& aAudioContext,

                               const DynamicsCompressorOptions& aOptions,

                               ErrorResult& aRv)

{

  if (aAudioContext.CheckClosed(aRv)) {

    return nullptr;

  }

  RefPtr<DynamicsCompressorNode> audioNode =

    new DynamicsCompressorNode(&aAudioContext);

  audioNode->Initialize(aOptions, aRv);

  if (NS_WARN_IF(aRv.Failed())) {

    return nullptr;

  }

  audioNode->Attack()->SetValue(aOptions.mAttack);

  audioNode->Knee()->SetValue(aOptions.mKnee);

  audioNode->Ratio()->SetValue(aOptions.mRatio);

  audioNode->GetRelease()->SetValue(aOptions.mRelease);

  audioNode->Threshold()->SetValue(aOptions.mThreshold);

  return audioNode.forget();

}

size_t

DynamicsCompressorNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const

{

  size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);

  amount += mThreshold->SizeOfIncludingThis(aMallocSizeOf);

  amount += mKnee->SizeOfIncludingThis(aMallocSizeOf);

  amount += mRatio->SizeOfIncludingThis(aMallocSizeOf);

  amount += mAttack->SizeOfIncludingThis(aMallocSizeOf);

  amount += mRelease->SizeOfIncludingThis(aMallocSizeOf);

  return amount;

}

size_t

DynamicsCompressorNode::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const

{

  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);

}

JSObject*

DynamicsCompressorNode::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return DynamicsCompressorNode_Binding::Wrap(aCx, this, aGivenProto);

}

} // namespace dom

} // namespace mozilla